Reasons.

There is a reason why woke up early that day,
why you wore your blue shirt instead of the red one and why after staring at all the pairs of shoes you own for more than ten minuted you picked your old snickers.
There is a reason why you changed your usual route to work and why you didn't find a cab,
why you didn't stop to buy cigarettes although you ran out of them,
There is a reason why you took the stairs instead of the elevator and were ten minutes late to your office,
There is a reason why your employer didn't scold you for being late and why the coffee machine in the break room was not working,
why you had to have that cop of coffee and decided to go to the first floor to see if the have some.
There is a reason why you stopped to tighten your shoelace although you could have done it later and why you cleaned your glasses although they weren't that dirty and why you stopped to say hi to one of your co-workers on your way to the break room on the first floor.
There is a reason why you decided to drink your coffee there instead of going back to your office,
and why you didn't stare aimlessly at your phone's screen.
There is a reason why a girl in a floral dress walked in and said hi and there is a reason why you didn't ignore her.

Six months later, you look at the girl in the floral dress sitting in the passenger seat of your car,
and now you understand why.